If you want small, cross in an A318 (BA) or a B737 (AC)!

A large number of 763s and 752s make it across the pond every single day. 763ERs have a very long range and can make it across the pacific too.

Having said that, if I have a choice between a 763 and a 772, I'd rather take a 772, as it is much more comfortable in various respects (depends on the airline of course)